Mazda Engines - Auto Repair Codes

Scan Tool for Codes and Live Data for your Mazda Engine from $199 USD

The information below may apply to Mazda Mazda 6, MX-3, RX7 and many other models

Step 5

Mazda EFI Code Reading

Connector Diagram

• On some late model Mazdas, the transmission codes are combined with the EFI codes and accessed through the EFI system.

Auto Repair Manual - How to read codes (No Special Tools Needed)

IMPORTANT:If after you turn the ignition ON does not show that it is outputtting any data there are either NO fault codes OR the vehicle has not been put into diagnostics mode correctly. To test the connection generate a fault code by disconnecting the airflow meter or throttle position sensor, crank or run the engine and re-run the Test.

1 Warm the engine and oxygen sensor (if fitted) to operating temperature then switch the engine off.

2 Connect an LED tester or Voltmeter to terminals 'A' & 'B'. (Click here for details) 

3 Ground the green single connector as shown in the diagram.

4 Turn ignition ON.

5 Read codes as described in the Code Format Description below.

6 Press the continue button to enter the code numbers and get the code description.

Code Format Diagram

Code Format Description

• Each code is made up of two series of flashes.

• The long flashes indicate the 'tens' digits.

• The short flashes indicate the 'ones' digits.

• A long pause separates each code sequence.

• Code Format Diagram shows code No. 12.

To move to the next screen click on the Continue button

 Continue > 

Note on Example Model(s): Mazda Mazda 6, MX-3, RX7
The example model(s) shown, Mazda Mazda 6, MX-3, RX7 for this auto repair service are only an indication to help you. There may be many other models that apply to this connector. Click above link to see the complete vehicle coverage list.